William h



(No Model.)

' W. H. DAYTON.

MAUHINE FOR SWAGING NEEDLE BLANKS No. 515,576. Patented Feb. 27, 1894."

L. V A \m mm www UNKTED STA-res PATENT Corinne WILLIAM H. DAYTON, OFTORRINGTCN, CONNECTICUT, ASSIGNOR TO THE EXCELSIOR NEEDLE COIWIPANKVOFSAME PLACE.

MACHINE FOR SWAGING NEEDLE-BLANKS.

SPECIFICATION forming part of Letters Patent No. 515,576, dated February27, 189 4.

, Application filed October 2,1893. Serial No. 486.930. (No model.)

. citizen of the United States, residing at Torrington,iu the countyofLitchfield and State of Connecticut, have invented an Improvement inMachines for Swaging Needle-Blanks andother Articles, of which thefollowing is a specification.

This improvement relates to that class of machines for swagin g wire,needle blanks and other articles, in which a head with dies in a mortiseacross at one end of the head, is revolved within a stationary shell,there being a circular range of rollers between the revolving head andthe interior of the circular shell. A machine of this kind isrepresented in Lettors Patent No. 376,144, granted to me Janua ry 10,1888. In machines of this character it has been usual to sustainrollers, in the circular range of rollers, by axes or pivots attherespective ends, such pivots or axes being re ceived into holes withincircular rings, and in consequence of the wear to which the parts aresubjected it has been usual to elongate theholes radially, and the ringshave been rotated within the head as the rollers were movedprogressively by contact with the outer ends of the swaging dies as suchdies were carried around by the revolving head. In prac tice I havefound that the pivots or axes of the rollers are liable to wear away,and when such roller axes become loose the rollers themselves do not actreliably and uniformly upon the swaging dies. My present improvement ismade with reference to sustaining the rollers in their properpositionsin the circular range of rollers and at the same time dispensing withthe axes or pivots of the rollers.

In carrying out my invention I provide a ring fitting loosely within thestationary shell and which ring is wider than the length of the rollersand thinner than the diameter of one of the rolls, and into this ringnotched recesses are formed for receiving the rolls, such notchedrecesses being smaller at their inner edges than the diameter of therolls, so that the rolls cannot fall inwardly, and the recesses are wideenough for the rolls to re- .main in such positions without unduefriction against the surfaces of the ring at the recesses, thereby therolls, which are plain cylinders, are held in position within thecircular head by the notched ring.

In the drawings, Figure 1 is an elevation of a swaging head with the capplates removed. Fig. 2 is a section representing the rolls constructedaccording to the present improvements.

The tubular shaft A is supported in a suitable shell B which is providedwith a stand or support, and the interior of the shell B is circular andof the proper diameter for receiving within the shell the dies C whichoccupy a transverse mortise in the head portion of the revolving shaftA. These dies may be of any desired character and either one or twopairs of dies may be made use of, and the rolls L are of the proper sizefor the space between the interior of the shell B and the ends of thedies C so as to act at the outer ends of such dies to close them towardeach other as the shaft A and dies are rotated.

Instead of providing axes or pivots at the ends of the rolls L, suchrolls L are simply made as short cylinders, and such rolls are held intheir proper positions by a ring N, which ring is turned up to fitloosely within the shell B and not to come into contact with the outerends of the dies C or their followers, and, into the ring, holes arebored of slightly larger diameter than the rolls L, such holes passingin a sufficient depth to receive the rolls, and such holes open asnotches through the inner edges of the ring and also through the outeredges of the ring, in order that the rolls may project sufficientlyinwardly for the dies or their followers to come into contact with suchrolls successively for closing the dies, and the outer edges of thenotches in the ring N allow the rolls to press against the interiorsurface of the shell B, so that the rolls are held in their proper relative positions by the partitions 2, 2 projecting from the circularportion 3 of the ring N. It will now be apparent that the rolls L arefree to roll against the interiorsurface of the shell B as such rollsare acted upon by the dies, and as the rolls travel progressively aroundupon the interior surface of the shell the ring N is carried along withsuch rolls,

and such ring serves the purpose of keeping the rolls at the properdistances from each other so that they may act properly upon the dies,and the wear is almost exclusively upon the rolls by the contacttherewith of the dies or followers, and when such rolls become worn orinjured they are easily taken out and others substituted, and it is onlynecessary to keep the surfaces of the parts sufficiently lubricated tocause the rollers to freely turn in their respective notched recesses,and at the same time there is but little friction between the rollersand the partitions, because there is no work performed by the ring Nexcept that of steadying the rolls and holding them in their properrelative positions for acting upon the dies or their followers.

It is generally preferable to employ a ring B secured to the end of theshell B for holding the rolls and the ring from end movement while themachine is in operation; and it is to be understood that this presentimprovement is available in any rotary swagin g machine of the generalcharacter herein described.

I claim as my invention- 1. The combination with a revolving shaft andthe dies carried by the same, of a circular shell surrounding the shaftand dies. a ring fitting loosely into the shell and having recessesopening through the outer and innet portions of the ring, and shortcylindrical rollers within such recesses to roll against the interiorsurface of the shell and to move the dies inwardly, substantially as setforth.

2. The combination with a revolving shaft and dies carried by that shaftand opening from and closing toward the center, of a surroundingcircular shell, short cylinders be--

